Authors:
Aida Vatankhah
;
Ramiro Liscano
and
Tarana Ara
Affiliation:
Dept. of Electrical, Computer, and Software Engineering, Ontario Tech University, Oshawa, Canada
Keyword(s):
Time-Slotted Channel Hoping, IEEE 802.15.4e, Slotframe Length, DE Optimization, Throughput, Network Delay.
Abstract:
The Time-Slotted Channel Hopping (TSCH) from the IEEE 802.15.4 standard aims at providing high reliability to industrial wireless networks. One of the most significant challenges in TSCH is determining the schedule. In this paper, we present an algorithm to find an optimal TSCH schedule with the minimum slotframe size that can meet the desired throughput of each node. A customized Differential Evolution (DE) optimization algorithm was developed based on the determination of an interference and collision free transmission graph which has not been used in prior works. Our schedule can encompass sensors with different packet rates and results in a low transmission delay of the data packets. Using Matlab, we performed various complexity analysis to measure the time it takes to find the optimal schedule in different scenarios. Additionally, we implemented the optimal TSCH schedule on TSCH-SIM simulator to confirm that the schedule is working promising. As a result, the high value of the P
acket Delivery Rate (PDR) obtained from the simulations verified the schedule performance.
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